Page 37
Wiring Recommendations
IF2008/PCIe / IF2008E
11.4
Encoder Interface
Pin X3
IF2008/PCIe
Signal
IF2008/PCIe
1 Vss or RS422
TTL (single-ended)
Signal
Encoder 1
Signal
Encoder 2
Signal
Encoder 1
Signal
Encoder 2
1
Encoder 1 track A+
A+
A
2
Encoder 1 track A-
A-
open
3
Encoder 2 track A+
A+
A
4
Encoder 2 track A-
A-
open
5
VCC (+5 V)
+UB
+UB
+UB
+UB
6
Encoder 1 track B+
B+
B
7
Encoder 1 track B-
B-
open
8
Encoder 2 track B+
B+
B
9
Encoder 2 track B-
B-
open
10
GND
GND
GND
GND
GND
11
Encoder 1 track R+
R+
R
12
Encoder 1 track R-
R-
open
13
Encoder 2 track R+
R+
R
14
Encoder 2 track R-
R-
open
15
GND
GND
GND
GND
GND
Fig. 48: Encoder interface
i
Plus inputs (A+, B+, R+) may not remain open. For example, if only the clock
signal is used, the plus inputs have to be set on GND or VCC.
Encoder
A+
A+
A-
A-
IF2008/PCIe
120R
B+
B+
B-
B-
120R
R+
R+
UB
+5V
GND
GND
R-
R-
120R
* = open at
single-ended
screen on
chassis
*
*
*
Fig. 49: Block diagram encoder interface
